Abstract:

This experiment was conducted to study the effects of γ-aminobutyric acid (GABA) on average daily gain, average daily feed intake, feed weight ratio and total protein, albumin level and serum glutamic oxalacetic transaminase activity in weaned piglets. 80 weaned piglets were divided randomly into I,Ⅱ, Ⅲ, Ⅳgroups with 20 in each group. Group I was control group. Group Ⅱ, Ⅲ, Ⅳ were added by 15 mg/kg, 25 mg/kg, 45 mg/kg GABA into diets respectively. The experiment lasted for 28 days. The effects of GABA on the growth performance of weaned piglets during the entire test period were studied and the serum levels of protein and enzyme activity at the end of the test were detected. The results showed that, the ABW and ADFI and ADG of group 15 mg/kg GABA was slightly less than the control group (P>0.05), and the group 15 mg/kg, 25 mg/kg GABA was significantly enhanced, compared with the control group (P<0.05); compared with the control group，the F/G of the group 15 mg/kg GABA was significantly lowered (P<0.05); There was no significant difference in serum TP, ALB content (P>0.05); compared with the control group, serum urea nitrogen level decreased significantly in the add group of 15mg/kg GABA(P<0.05); The test group GOT activity was lower than that of control group (P>0.05); The activity of ALT the group 15 mg/kg was significantly lower than that of the control group (P<0.01), and than that of the group 25 mg/kg GABA (P<0.05). The results indicated that 15 mg/kg GABA could improved average daily gain, average daily feed intake of weaning pigs, reduced effectively the level of serum urea nitrogen and GOT, ALT activity.